The Skylink Technologies LK-318-3 SkylinkHome 3-Button Keychain Remote is a compact transmitter that can be carried with you and used to control many different SkylinkHome receivers. It offer a long distance communication range of up to 300 feet in an open area. Press different buttons to control different applications with SkylinkHome control receivers such as a Plug-In Dimmer Module, Screw-In Dimmer Module or In Wall Dimmer Switch. The transmitter also has optional Passcode protection for enhanced security. The remote is easy to program and easy to use. A long life CR-2032 battery comes conveniently pre-installed.